Stanley Sharpshooter Staples, 3/8 Inch Leg Length, 1000/Box (TRA706T) Perfect for insulation jobs. Can be used for carpet underlaying and roofing felt. For Use with Stanley Bostitch SharpShooter Tacker (TR150) For heavy duty stapling jobs such as insulation, carpet under laying and roofing felt Color-coded packaging makes size and product selection a cinch Sturdy plastic packaging reduces staple breakage Heavy Duty  Narrow Crown  fits TR100, TR200, TRE500 series, PHT150, PHT250 and Arrow T-50 Limited Lifetime Warranty